Handle exceptions gracefully

models.py

@@ -15,4 +15,15 @@ class RuleChecker:
 
     def check_rule(self, rule_name) -> RuleCheckResult:
         check_func = getattr(self, convert_snake_case(rule_name))
-        return check_func()
+        try:
+            result = check_func()
+        except Exception as e:
+            result = RuleCheckResult(
+                passed=False,
+                compliant_resources=[],
+                non_compliant_resources=[
+                    "Rule check failed due to folling errors: ",
+                    str(e),
+                ],
+            )
+        return result

services/cloudfront.py

@@ -9,7 +9,7 @@ class CloudFrontRuleChecker(RuleChecker):
 
     @cached_property
     def distributions(self):
-        return self.client.list_distributions()["DistributionList"]["Items"]
+        return self.client.list_distributions()["DistributionList"].get("Items", [])
 
     @cached_property
     def distribution_details(self):

services/codeseries.py

@@ -11,6 +11,8 @@ class CodeSeriesChecker(RuleChecker):
     @cached_property
     def projects(self):
         project_names = self.build_client.list_projects()["projects"]
+        if not project_names:
+            return []
         return self.build_client.batch_get_projects(names=project_names)["projects"]
 
     def codebuild_project_environment_privileged_check(self):
@@ -59,6 +61,10 @@ class CodeSeriesChecker(RuleChecker):
             deployment_group_names = self.deploy_client.list_deployment_groups(
                 applicationName=application
             )["deploymentGroups"]
+
+            if not deployment_group_names:
+                continue
+
             deployment_groups = self.deploy_client.batch_get_deployment_groups(
                 applicationName=application, deploymentGroupNames=deployment_group_names
             )["deploymentGroupsInfo"]